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(1 山東電力建設(shè)第三工程有限公司, 青島 266100; 2 四川大學(xué)土木工程系, 成都 610065)
摘要: 電力工業(yè)結(jié)構(gòu)是重要的基礎(chǔ)設(shè)施之一。 受生產(chǎn)工藝的影響,火力發(fā)電廠主廠房存在結(jié)構(gòu)布置復(fù)雜與不規(guī)則的特點(diǎn)。 為了提高火電廠主廠房結(jié)構(gòu)的抗震性能,減小地震災(zāi)害下因發(fā)電生產(chǎn)中斷造成的直接和間接損失,基于一實(shí)際火電廠主廠房結(jié)構(gòu),發(fā)展了減隔震結(jié)構(gòu)體系。 主要對(duì)重型煤斗設(shè)備進(jìn)行了隔震處理,并配合使用附加防屈曲支撐與金屬軟鋼阻尼器。 對(duì)該火電廠主廠房的原抗震結(jié)構(gòu)體系與減隔震結(jié)構(gòu)體系進(jìn)行有限元建模,對(duì)用于模擬鋼支撐、隔震支座及附加消能裝置的單元參數(shù)經(jīng)試驗(yàn)結(jié)果進(jìn)行校正取值。 選擇 15 組天然地震動(dòng),對(duì)兩個(gè)結(jié)構(gòu)體系的數(shù)值模型開展動(dòng)力時(shí)程分析,分別從單個(gè)時(shí)程工況下結(jié)構(gòu)損傷情況、設(shè)防地震強(qiáng)度下結(jié)構(gòu)層間位移角分布均值、結(jié)構(gòu)地震易損性三個(gè)方面對(duì)比抗震結(jié)構(gòu)體系與減隔震結(jié)構(gòu)體系的抗震性能。 結(jié)果表明,發(fā)展的減隔震結(jié)構(gòu)體系有效保護(hù)了主體結(jié)構(gòu)不受損壞,層間位移角響應(yīng)沿高度分布更為均勻,且三個(gè)性能水準(zhǔn)下的抗力中位值提高至原抗震結(jié)構(gòu)體系的 1?? 4~ 2 倍。
關(guān)鍵詞: 火電廠; 煤斗隔震; 消能減震; 抗震性能; 易損性
中圖分類號(hào):TU355 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002?848X(2022)14?0085?07
DOI:10?? 19701 / j?? jzjg?? 20201262
Seismic performance evaluation for a complex thermal power plant building using isolation and
supplemental damping systems
YIN Yexian1, WANG Jianze2, ZHOU Yuzhou2, DAI Kaoshan2, ZHA Junlong2
(1 SEPCOIII Electric Power Construction Corporation, Qingdao 266100, China;2 Department of Civil Engineering, Sichuan University, Chengdu 610065, China)
Abstract: The structure of electric power industry is one of the important infrastructures. Due to the constraints byoperational practice, the thermal power plant buildings are featured with complexity and irregularity. With the purpose ofimproving the seismic performance of the thermal power plant buildings and reducing the direct and indirect seismic loss,the seismic resilient system was developed based on a real thermal power plant building. Isolation technique was used forthe heavy coal bunkers housed in the building. Also, buckling?restrained braces and yielding steel panel damper wereconsidered. The numerical models for the seismic resilient system and the conventional seismic system were established.The parameter values for modeling steel braces, isolators, dampers were verified by testing results. A total of 15 pairs ofground motions were selected and response?history analyses were performed. The seismic performances of the seismicresilient system and the conventional seismic system were compared from three aspects: the structural damage under a singletime?history condition, the mean value of the story drift profile distribution under the fortified seismic intensity, and thestructural seismic fragility. The results show that the adopted passive control techniques protected the structure. The storydrift profiles along major axis of the structure are more uniform than the conventional building system. Moreover, themedian seismic capacities of the seismic resilient system are up to 1?? 4~ 2?? 0 times the capacities of the conventional system.
Keywords: thermal power plant; coal bunker isolation; supplemental damping system; seismic performance;seismic fragility
∗國家自然科學(xué)基金 (U1710111 & 51878426), 中國電力建設(shè)股份有限公司科研項(xiàng)目(KJ?2016?095)。第一作者:尹業(yè)先,學(xué)士,高級(jí)工程師,主要從事電力土建施工技術(shù)與管理,Email: yinyexian@ sepco3. com。通信作者:戴靠山,博士,教授,主要從事工程結(jié)構(gòu)抗震研究,Email: kdai@ scu. edu. cn。[引用本文] 尹業(yè)先,王健澤,周裕洲,等. 復(fù)雜火電廠主廠房結(jié)構(gòu)減隔震體系抗震性能評(píng)估[J]. 建筑結(jié)構(gòu),2022,52(14):85?91. YIN Yexian,WANG Jianze,ZHOU Yuzhou,et al. Seismic performance evaluation for a complex thermalpower plant building using isolation and supplemental damping systems[J]. Building Structure,2022,52(14):85?91.
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